Objective approach in the assessment of speech quality in patients with tongue cancer after hemiglossectomy oleh Ch. A. Ganina, M. A. Kropotov, O. A. Saprina, E. V. Kosova, V. Zh. Brzhezovskiy, D. I. Novokhrestova, M. T.  Isaeva, Е. A. Grivachev